Combined equation of co-ordinate axes is _______.

(a)

x²-y² = 0

(b)

x²+y² = 0

(c)

xy = c

(d)

xy = 0

In the equation of the circle x² + y² = 16 then y intercept is (are) _______.

(a)

4

(b)

16

(c)

±4

(d)

±16

The equation of the circle with centre (3,-4) and touches the x - axis is _______.

(a)

(x - 3)² +(y - 4)² = 4

(b)

(x - 3)² +(y + 4)² = 16

(c)

(x-3)² + (y- 4)² = 16

(d)

x²+y² = 16

The eccentricity of the parabola is _______.

(a)

3

(b)

2

(c)

0

(d)

1

The distance between directrix and focus of a parabola y² = 4ax is _______.

(a)

a

(b)

2a

(c)

4a

(d)

3a